newlib/winsup/mingw/mingwex/fegetround.c

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#include <fenv.h>
#include "cpu_features.h"
/* 7.6.3.1
The fegetround function returns the value of the rounding direction
macro representing the current rounding direction. */
int
fegetround (void)
{
unsigned short _cw;
__asm__ ("fnstcw %0;" : "=m" (_cw));
/* If the MXCSR flag is different, there is no way to indicate, so just
report the FPU flag. */
return _cw
& (FE_TONEAREST | FE_DOWNWARD | FE_UPWARD | FE_TOWARDZERO);
}